Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Microstructure and Mechanical Properties of Co-Cr-Mo alloy for CAD/CAM Applications fabricated by Powder Metallurgy Process

분말야금공법으로 제조된 CAD/CAM용 Co-Cr-Mo 합금의 미세조직 및 기계적 특성

  • Cha, Sung-Soo (Dept. of Dental Lab Technology, Jinju Health College)
  • Received : 2015.10.30
  • Accepted : 2015.12.09
  • Published : 2015.12.30
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Abstract

Purpose: The aims of this study are compare with microstructure and mechanical properties of Co-Cr-Mo alloys fabricated by powder metallurgy(P/M) process and casting process respectively. Methods: Microstructure and micro-hardness were tested by SEM and Vickers Hardness Tester. The sintered specimen was produced by furnace-coolling after sintering, however the casting specimen were produced thru air-cooling and water-cooling after the casting. For observation of phase transformation during sintering, DSC analyzing was carried out. Results: Mean pore size of sintered Co-Cr-Mo alloy was $4.32{\mu}m$ and that of casting alloy was $1.63{\mu}m$. Hardness of sintered alloy was lower than water-quenched casting alloy. Conclusion: Proper sintering temperature of Co-Cr-Mo alloy was above $1,200^{\circ}C$ and pore size of casting specimen were finer than sintered specimen, but hardness were similar.

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References

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